Grading-machine



W.- D. ARNETT. GRADING MACHINE.

No. 472,569. PatenteApr. 12', 1892.'

Inl/3721???? W a' t/z asses.

we News Penna co., mqnrump., vusnmnrou, n. c.

I UNITED STATES PATENT OFFICE.

VILLIAM D. ARNETT, OF OALDVELL, IDAHO.

GRADING- MACHINE.

SPECIFICATION forrning part of Letters Patent No. 472,569, dated April 12, 1892.

' Application filed J' une 25 1891.V

Serial No. 397,507. (No model.)

'the same by moving the earth from the elevations into the hollows or depressions; and it 'conssts,essentially, in a jointed frame provided with sustaining-runners, plows, and

Scrapers, and with means for adjusting the j frame to control the action of the plows and '2b tposed. of longitudinal beams a, tlrmly secured facilitate the turning of the machine.

4forward end the frame has a sustaining-arm Scrapers, as hereinafter explained in detail. A :Figure l 1s a top plan View of my machine; Fig. 2, a longitudinal section of the same on the line 2 2; Fig, 3, a transverse section on the line 3 3 of the preceding ligures.

A ,represents a rigid horizontal frame comto the'cross-timbers a a2 a3. At the rear end A the frame is sustained by two underlying runnersd, attached thereto by vertical pivots ll) at the forward end,so that they may swingl laterally, as indicated in dotted lines, and thus At the a4, which rests normally on a draft-frame C, which 1n turn rests upon a sled or runner D,

. connected tothe draft-frame by a verticalpin or king-bolt d and provided with a doubletree E or other means for the attachment of the draft-animals. The draft-frame C is constr-uctedI with arms c, extending rearward along the sides of the main frame A and connected theretomidway of itslength by horizontal pivots c', in order that the forward end of the main frame may rise and fall independently. At the rear endof `the draftframe there are two runners F, attached thereto, as shown, or to .the main frame,jif preferred, in order to limit the falling motion of the latter when the front or rearv runners ride into depressions on the surface. These runners are attached by horizontal pivots f at the front and secured by bolts, which may be changed in position to raise or lower the run- .V ner. To the main frame A at or near its middle is attached a series of plows or shares G of the form shown or of any other form adapted to loosen the soil, and behind each of these plows there is secured to the frame a broad-faced scraper-blade or shovel H, adapted to carry the loosened soil forward into the hollows. On the front end of the draft-frame C there is a standard I, and on the standard there is pivoted a hand-lever J, connected by linklg/- to the arm a4 on the front end of the main frame, so that by depressing the rear end of the leverthefront end of the main frame may be raised and the plows and shovels thereby lifted out of action. A hook jz on the main frame serves to hold theV lever and lock the frame in its elevated position, as indicated by 4dotted lines. As the machine is drawn forward it is sustained normally by the front and rear runners, and the plows and shovels act, as in Fig. 2, von the elevated portions of the surface, and not elsewhere, to loosen the soil and advance the saine into the hollows. The sinking ofthe plows into the hollows is prevented bythe contact of the main frame with the front supports, so that the machine bridges over Vthe intervals between elevations. The runners at the middle limit the depth to which the plows can enter the soil whenever the front or rear runners, entering a depression, become inoperative for this purpose.

. It is manifest that plows, shares, or Scrapers of any suitable form may be used on the frame to loosen and move the earth, and the word plows is used in the following claims in a generic sense, as including any means the equivalent of those herein shown for the purpose named.

What l claim as my invention isl. The main frame provided with the plows, shovels, and rear runners, in combination with the front sled or runner and the intermediate draft-frame connected with the main frame by horizontal pivots and with the front runner by the vertical pivot or king-bolt.

2. The main frame having the plows and rear runners, in combination with the front the sled and main frame, and adjusting devices, substantially as shown, connecting the frame. A

3. In combination, the main fiume with plows and the rear runners, the front sied, the intermediate draft-frame jointed to the main frame and sled, substantially us shown, and the intermediate runners to limit the depth of the plows.

In testimony whereof I hereunto set my to hand, this 10th day of June, 1891, in the presenoe oi two attestng witnesses.

\VILLIAM D. ARN ETT.

Witnesses:

T. C. ROCKWELL, SWAIN BEATY. 

